Manufacture of electrical conductors



(No Model.)

T. SHAW. MANUFACTURE OF BLEGTRIGALGONDUGIORS.

" 0. 296,074. PatentedApfi 1,1884."

L ma V jnvemldu.

N. PETERS HMO-Lithograph Waihingtm D. 0.

' UNITED STATES PAT NT OFFICE.

THOMAS SHAW, oE NEWARK, NEW JERSEY, ASSIGNOR To WILLIAM H.

BITTER, OF NEW YORK, n. Y.

MANUFAQTURE OF ELECTRICAL. CONDUCTORS.

SPECIFICATION forming part of Letters Patent No. 296,074, dated April 1,1884. Application filed January 31, 1883. (No model.)

Manufacture of Electrical Conductors, of which the following is aspecification.

My invention has reference to the process of manufacture, of a compoundtelegraph or "telephone wire; and it consists in inclosing a core of onemetal within a tube or case of another metal, and then securing the twometals together by solder.

Telegraph-wires now generally used are composed of iron or of copper,the conductingpower of the former being far inferior to that jectionsmay be overcome by combining the copper with another metal as, forinstance,

' phosphor bronzewhich has greater strength outer covering, as desired,and the two metals or tenacity, the copper being made the core or Thecore 0 is inserted therein, and the solder I (preferably hard solder) iscaused to flow through the aperture B or end, and fills the space Dbetween the core 0 and case or tube A, thus securing the two metalsfirmlytogether,

and forming a compound billet, which is then rolled or drawn down,either hot or cold, to the requisite size, thus forming a wire in whichthe core is of one metal and the covering another, the two being asfirmly attached as if made of a single piece of metal. In practice, itis necessary to clean the opposing surfaces of the core and case withboraX-Water or other suitable flux, and thereby insure a perfect unionof the two metals, when the solder is applied, the'latter being fused bymeans of gas'jetsor other fire.

It is preferable to make the core 0 fit loosely in the tube A, to enableits more ready insertion and admission of solder.

In this application I make no claim to the construction of the wire asan article of manufactu re, as that forms subject-matter of anotherpending application,

'Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The method herein described of forming a compound wire, consisting informing a slotted cylinder of one metal or alloy, inserting a core orrodof another metal or alloy, and in sorting solder between them throughthe slot, forming a solid ingot or blank for wire-drawing, substantiallyas set forth.

2. The process of manufacturing acompound wire, consisting in forming aslotted cylinder of one metal or alloy, and inserting a core or rod ofanother metal or alloy, and uniting them with solder inserted throughthe slot, forming a solid ingot or blank, and then passing the ingotthrough rolls or dies, producing afinished compound wire.

In testimony of which invention I hereunto set my hand.

THOMAS SHAW.

Witnesses:

H. G. HUNTEMANN, JOHN It. BENNETT.

